<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>设置移动样式</title>
        <style>
            *{
                margin: 0;
                padding: 0;
            }
            html{font-size:100px;}
            body{font-size:16px;}
            .list li{
                width:1.25rem;
                height:1.20rem;
                list-style: none;
                background: #e3e3e3;
                box-sizing: border-box;
                border:1px solid #9ee;
                float: left;
            }
        </style>
    </head>
    <body>
        <ul class="list">
            <li></li>
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </body>
</html>